Stream information in start stream event

[rasnaut]

Hello,
I work with gstreamer-1.11. My programm catch iptv stream and decode it by
decodebin. In some stream I need have possibility select audio stream. I
want using stream ID information, but I don't know, how I can get it. My
function for working with stream events:
void CV_on_pad_added (GstElement *element, GstPad *pad, gpointer    data)
{
    //g_print("pad added start for chan === %d\n",my_channel->num );
    GstCaps *caps;
    GstStructure *str;
    IPHead* pIpHead = (IPHead*) data;
    //GstElement *decoder = (GstElement *) data;
    caps = gst_pad_query_caps(pad,NULL);
    //caps = gst_pad_get_current_caps(pad);
    //g_assert (caps != NULL);
    str = gst_caps_get_structure (caps, 0);
    //g_assert (str != NULL);
    const gchar *c = gst_structure_get_name(str);
    g_print("on_pad_added: %s\n",c);
    if (g_strrstr (c, "video") || g_strrstr (c, "image"))
    {
            g_debug ("Linking video pad to dec_vd");
            // Link it actually
            GstPad *targetsink = gst_element_get_static_pad
(pIpHead->queueV, "sink");
            g_assert (targetsink != NULL);
            g_print("\nVIDEO--pad source: %s\n", gst_pad_get_name(pad));
            g_print("\nVIDEO--pad sink: %s\n",
gst_pad_get_name(targetsink));
            gst_pad_link (pad, targetsink);
            if (gst_pad_is_linked(pad)) g_print("The video pad src was
linked\n");
            g_print("unref here Vid105\n");
            gst_object_unref (targetsink);
            //pIpHead->skipCnt = 8;
    }
    if (g_strrstr (c, "audio"))
    {
            g_debug ("Linking audio pad to dec_ad");
            // Link it actually
            GstPad *targetsink = gst_element_get_static_pad
(pIpHead->queueA, "sink");
            g_assert (targetsink != NULL);
            g_print("\nAUDIO--pad source: %s\n", gst_pad_get_name(pad));
            g_print("\nAUDIO--pad sink: %s\n",
gst_pad_get_name(targetsink));
            if (gst_pad_is_linked(targetsink))
            {
                g_print("The audio target sink was already linked\n");
            }
            else
            {
                gst_pad_link (pad, targetsink);
                if (gst_pad_is_linked(pad)) g_print("The audio pad src was
linked\n");
            }
            gst_object_unref (targetsink);
    }

    gst_caps_unref (caps);
}

So, what I need add to this, that I can get stream ID (or language) info?
Thank you.



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